D modeling
==============


Characteristics of modeling
-----------------------------------

**2D modeling elements** **AXIS_DIAG**


Characteristics of the mesh
----------------------------

Number of knots: 3782

Number of meshes and types: 2400 meshes including 800 TRIA6, 400 QUAD9, 400 QUAD4 and 800 TRIA3.

The mesh includes 4 squares STR6, SQU9, SQU4, and STR3 meshed respectively with elements TRIA6, QUAD9, QUAD4, and TRIA3. Each square is discretized with 20 elements along X and Y.


.. image:: images/100047EE000019F2000019651A6C4CB9F4DC77F0.svg
    :width: 251
    :height: 245


.. _RefImage_100047EE000019F2000019651A6C4CB9F4DC77F0.svg:


.. csv-table::

    "GROUP_MA name ", "Item type"
    "STR6 "," TRIA6"
    "SQU9 "," QUAD9"
    "SQU4 "," QUAD4"
    "STR3 "," TRIA3"


The nodes used for post-processing are:


.. csv-table::

    "Node name", "Coordinates", "Node number", "Node number", "Name of a mesh containing this node", "Type of mesh"
    "A", "(1.0; 0.5)", "N1", "M1"," TRIA6"
    "C", "(5.0; 0.5)", "N2481", "M820"," QUAD9"
    "J", "(1.0; 5.0)", "N3401", "M1581"," QUAD4"
    "L", "(5.0; 5.0)", "N3840", "M2400"," TRIA3"


The entire mesh is affected by thermal modeling AXIS_DIAG.


Tested results and sizes
------------------------------


* With a linear temperature field (constant flow):


+-----------------+--------------+--------+-------------+---------+----------------+
|**Location**                    |**Size**|**Reference**|**Aster**|**% difference**|
+-----------------+--------------+--------+-------------+---------+----------------+
|**Mesh**         |**Node or PG**|        |             |         |                |
+-----------------+--------------+--------+-------------+---------+----------------+
|                 |Node A        |T       |3.5          |3.5      |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1 (TRIA6)       |Node A        |x (ELNO)|-2.0         |-2.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1 (TRIA6)       |Node A        |Y (ELNO)|-3.0         |-3.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1 (TRIA6)       |Point 1       |x (ELGA)|-2.0         |-2.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1 (TRIA6)       |Point 1       |Y (ELGA)|-3.0         |-3.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|                 |Node C        |T       |11.5         |11.5     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M420 road (QUAD9)|Node C        |x (ELNO)|-2.0         |-2.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M420 road (QUAD9)|Node C        |Y (ELNO)|-3.0         |-3.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M420 road (QUAD9)|Point 1       |x (ELGA)|-2.0         |-2.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M420 road (QUAD9)|Point 1       |Y (ELGA)|-3.0         |-3.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|                 |J knot        |T       |17.0         |17.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1181 (QUAD4)    |J knot        |x (ELNO)|-2.0         |-2.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1181 (QUAD4)    |J knot        |Y (ELNO)|-3.0         |-3.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1181 (QUAD4)    |Point 1       |x (ELGA)|-2.0         |-2.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1181 (QUAD4)    |Point 1       |Y (ELGA)|-3.0         |-3.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|                 |L knot        |T       |25.0         |25.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M2000 (TRIA3)    |L knot        |x (ELNO)|-2.0         |-2.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M2000 (TRIA3)    |L knot        |Y (ELNO)|-3.0         |-3.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M2000 (TRIA3)    |Point 1       |x (ELGA)|-2.0         |-2.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M2000 (TRIA3)    |Point 1       |Y (ELGA)|-3.0         |-3.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+


* With a quadratic temperature field (linear flow):


+-----------------+--------------+--------+-------------+---------+----------------+
|**Location**                    |**Size**|**Reference**|**Aster**|**% difference**|
+-----------------+--------------+--------+-------------+---------+----------------+
|**Mesh**         |**Node or PG**|        |             |         |                |
+-----------------+--------------+--------+-------------+---------+----------------+
|                 |Node A        |T       |2.75         |2.75     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1 (QUAD8)       |Node A        |x (ELNO)|-4.0         |-4.2     |5%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1 (QUAD8)       |Node A        |Y (ELNO)|-3.0         |-3.3     |10%             |
+-----------------+--------------+--------+-------------+---------+----------------+
|                 |Node C        |T       |50.75        |50.75    |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M420 road (QUAD9)|Node C        |x (ELNO)|-20.0        |-19.8    |-1%             |
+-----------------+--------------+--------+-------------+---------+----------------+
|M420 road (QUAD9)|Node C        |Y (ELNO)|-3.0         |-3.3     |10%             |
+-----------------+--------------+--------+-------------+---------+----------------+
|                 |J knot        |T       |77.0         |77.0     |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1181 (QUAD4)    |J knot        |x (ELNO)|-4.0         |-4.2     |5%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M1181 (QUAD4)    |J knot        |Y (ELNO)|-30.0        |-29.7    |-1%             |
+-----------------+--------------+--------+-------------+---------+----------------+
|                 |L knot        |T       |125.0        |125.0    |0%              |
+-----------------+--------------+--------+-------------+---------+----------------+
|M2000 (TRIA3)    |L knot        |x (ELNO)|-20.0        |-19.8    |-1%             |
+-----------------+--------------+--------+-------------+---------+----------------+
|M2000 (TRIA3)    |L knot        |Y (ELNO)|-30.0        |-29.7    |-1%             |
+-----------------+--------------+--------+-------------+---------+----------------+